A filter that starts at low load

Abstract

The present invention belongs to the technical field of filters, and specifically relates to a low-load start-up filter, comprising a housing, a sewage outlet is arranged at the lower part of the housing; a filter assembly; a scraping mechanism, which is rotatably installed in the housing and is used to scrape off the debris on the surface of the filter assembly; a valve; when the valve is opened, water flows through the impeller of the scraping mechanism and pushes the scraping mechanism; the scraping mechanism comprises a rotating bracket, on which a scraping blade is arranged; when the rotating bracket rotates, centrifugal force directly or indirectly acts on the scraping blade, so that the scraping blade is closely attached to the surface of the filter assembly; the scraping mechanism also comprises a scraping mechanism for the outer wall of the filter: a plurality of second columns are arranged on the peripheral side of the rotating bracket, a second mounting groove is arranged on the second column, and a scraping blade outside the filter is placed in the second mounting groove. In the present invention, when a certain rotation speed is reached, the centrifugal force causes the scraping blade to squeeze the filter assembly to scrape off the debris, and the cleaning effect is good, and it is particularly suitable for occasions with low water pressure.

Description

Technical Field

[0001] The invention belongs to the technical field of filters, and in particular relates to a low-load starting filter. Background Art

[0002] CN201620143903.X discloses an impeller-driven sewage discharge pre-filter, in which water flows into the filter assembly from the water inlet, and is then transported to the water outlet after being filtered. The filter assembly traps impurities on the filter of the filter assembly. When sewage needs to be discharged, the lower valve is opened, and the water flows through the impeller to push the brush to clean the filter. This technical solution has the following disadvantages:

[0003] 1. The brush must fit closely to the filter surface to have better cleaning ability; however, when the brush fits closely, the resistance of the impeller will increase; when the water pressure is insufficient, the impeller may not start;

[0004] 2. After long-term use, the brush will be deformed or worn, and cannot maintain the initial fit effect. The cleaning ability of the filter will gradually decrease, and it can only be maintained by replacing accessories;

[0005] 3. The brush can only clean one side of the filter assembly, and the cleaning effect is limited.

[0006] 4. The filter is supported by the frame, the effective filtering area is insufficient, and the filtering effect is limited; after long-term use, the filter near the frame will be deformed by the water pressure and cannot fit the brush, which reduces the cleaning ability;

[0007] 5. The filter assembly is fixedly installed, and the rotating bracket needs to be rotated to be cleaned; therefore, each cleaning will cause wear of the filter assembly. After a long time, a gap will be generated between the filter assembly and the rotating bracket, and water will flow directly through the gap instead of through the filter;

[0008] 6. The brush is driven by the rotating bracket, and the rotating bracket is driven by the impeller; the impeller needs to overcome the resistance between the brush and the filter assembly, the resistance between the rotating bracket and the filter assembly, etc. Even under standard water pressure, the rotation of the impeller is relatively difficult; in order to achieve the effect of high-speed rotation, some manufacturers deliberately reduce the fit between the brush and the filter assembly, resulting in weak cleaning effect. Summary of the invention

[0009] The present invention aims to provide a filter which uses centrifugal force to start at a low load and then cleans the filter assembly when a corresponding rotation speed is reached.

[0010] The object of the present invention is achieved in that:

[0011] A filter for low load start-up, comprising,

[0012] The shell body has a water inlet and a water outlet at the top and a sewage outlet at the bottom;

[0013] The filter assembly is cylindrical and installed in the middle of the shell;

[0014] The rotary scraper mechanism is rotatably mounted in the housing and is used to scrape off debris on the surface of the filter assembly;

[0015] A valve, used to close or open the sewage outlet; when the valve is opened, water flows through the impeller of the rotary scraper mechanism and pushes the rotary scraper mechanism;

[0016] The rotary scraping mechanism includes a rotating bracket, on which a plurality of mounting grooves are arranged, and scrapers are placed in the mounting grooves; when the rotating bracket rotates, centrifugal force directly or indirectly acts on the scrapers, so that the scrapers are closely attached to the surface of the filter assembly;

[0017] The rotary scraping mechanism also includes a filter screen outer wall rotary scraping mechanism: a plurality of second columns are arranged on the peripheral side of the rotating bracket, a second mounting groove is arranged on the second column, and a filter screen outer scraper is placed in the second mounting groove.

[0018] Preferably, the upper end of the filter assembly is connected to the water inlet; the lower end of the filter assembly is connected to the sewage outlet; and the chamber outside the filter assembly is connected to the water outlet.

[0019] Preferably, the rotary scraping mechanism comprises a filter inner wall rotary scraping mechanism: a first column is arranged in the middle of the rotating bracket, a first mounting groove is arranged on the side of the first column, an inner scraper is arranged in the first mounting groove and placed in the first mounting groove; the first column extends into the interior of the filter assembly;

[0020] When the rotating bracket is rotated by external force, the first column rotates and throws the inner scraper blade out to be closely attached to the inner wall of the filter assembly.

[0021] Preferably, a swing rod is hingedly connected to the second upright post on the outer side of the outer scraper of the filter screen;

[0022] When the rotating bracket rotates, one end of the swing rod is thrown outward by centrifugal force to form a centrifugal end, and the other end of the swing rod moves inward to form a working end, which presses the outer scraper of the filter against the filter assembly.

[0023] Preferably, the outer scraper of the filter screen is a flexible sheet, and an auxiliary strip is embedded inside the outer scraper of the filter screen, and the auxiliary strip has a certain hardness.

[0024] Preferably, the scraping mechanism includes a shell inner wall scraping mechanism: a third column is arranged on the peripheral side of the rotating bracket, a third mounting groove is arranged on the outer side of the third column, and a bottle body scraper is arranged in the third mounting groove; when the rotating bracket rotates, the third column swings the bottle body scraper to be tightly attached to the inner wall of the shell.

[0025] Preferably, the scraping mechanism includes a driving mechanism: a fixed seat is provided on the inner side of the lower part of the shell, and a rotating bracket is rotatably arranged inside the fixed seat; the impeller is fixed to the lower part of the rotating bracket, and a water flow outlet is provided on the circumferential side of the impeller; the water flow outlet faces the water flow impact surface on the inner side of the fixed seat, and the water flow impact surface includes recessed portions and convex portions arranged at intervals.

[0026] Preferably, a plurality of vertical convex strips are arranged on the water flow impact surface, and a groove is formed between two adjacent convex strips.

[0027] Preferably, the housing comprises a bottle body and a base;

[0028] A sleeve is formed downwardly in the middle of the inner side of the base, and the sleeve is connected to the water inlet or the water outlet;

[0029] The upper end of the filter assembly extends into the sleeve and is sealed against the wall of the sleeve;

[0030] A spring is arranged in the sleeve, and the lower end of the spring abuts against the upper end of the filter assembly, so that the filter assembly maintains a downward movement trend, and the lower end of the filter assembly fits in the middle of the rotating bracket.

[0031] Preferably, the base comprises a metal outer shell and a plastic inner shell;

[0032] The metal shell is in the shape of a cylinder with a closed top, a water inlet pipeline is arranged on one side of the metal shell, and a water outlet pipeline is arranged on the other side of the metal shell;

[0033] The plastic inner shell is attached to the inner wall surface of the metal outer shell, and a sleeve is formed downwardly from the top of the plastic inner shell. The sleeve is concentrically arranged with the plastic inner shell and divides the chamber of the plastic inner shell into a water inlet chamber and a water outlet chamber.

[0034] The inner wall of the water inlet pipeline is provided with a plastic water inlet inner tube, the inner end of which extends to the sleeve and communicates with the water inlet cavity;

[0035] The inner wall of the water outlet pipeline is provided with a plastic water outlet inner tube, and the inner end of the water outlet inner tube extends to the water outlet cavity.

[0036] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0037] In the initial state of the scraper of the present invention, the filter assembly and the inner wall of the bottle body are not pressed tightly, and there is no load at these parts; the rotary scraper mechanism is started under a relatively low load, and when a certain rotation speed is reached, the centrifugal force causes the scraper to squeeze the filter assembly to scrape away debris, with a good cleaning effect, and is particularly suitable for occasions with low water pressure.

[0038] The scraper blade of the present invention is driven directly or indirectly by centrifugal force. When the scraper blade is worn, the centrifugal force causes the remaining part of the scraper blade to automatically compensate and fit, thereby maintaining a good scraping effect without causing performance degradation and having a very long service life.

[0039] The present invention can clean the inner and outer side walls of the filter assembly and the inner wall of the bottle body, thereby effectively improving the cleaning effect.

[0040] The filter screen of the present invention is a complete cylinder and does not require a skeleton for support; each scraping is performed on both the inner and outer walls of the filter screen simultaneously, and the scraping process is also a process of repairing the shape of the filter screen, without worrying about deformation of the filter screen due to water pressure.

[0041] The filter assembly of the present invention is provided with a spring at the upper end, which makes the filter assembly have a tendency to move downward. When the lower end of the filter assembly is worn, the spring makes the filter assembly move downward automatically, while still maintaining the fit between the filter assembly and the rotating bracket, ensuring that the water flow must pass through the filter.

[0042] The water flow outlet of the impeller of the present invention faces the water flow impact surface on the inner side of the fixed seat, and the water flow impact surface includes recessed portions and convex portions arranged at intervals; when the impeller rotates, the water flow ejected from the water flow outlet passes through the recessed portions and convex portions in sequence, which will change the smoothness of water discharge, so that the force applied to the impeller is in a changing state. This design can start the impeller more smoothly and ensure the normal operation of the scraping mechanism.

[0043] The base of the present invention includes a metal outer shell and a plastic inner shell, so that the metal part is almost not in contact with the water flow, ensuring that the water flow will not be contaminated by heavy metals and is not easy to rust; moreover, in relatively cold areas, the metal outer shell may freeze and crack, but the plastic inner shell basically will not freeze and crack, which can further ensure the safe and reliable transportation of water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a stereogram of the filter;

[0045] Figure 2 is a cross-sectional view of the filter;

[0046] Figure 3 is a cross-sectional view of the filter in another direction;

[0047] Figure 4is a schematic diagram of the rotary scraping mechanism of the filter;

[0048] Figure 5 is an exploded view of the scraping mechanism of the filter;

[0049] Figure 6 is a schematic diagram of a rotating bracket;

[0050] Figure 7 is a partially cutaway schematic diagram of the filter assembly;

[0051] Figure 8 It is a schematic diagram of the wear ring and blade portion at the bottom of the filter assembly;

[0052] Fig. 9 Schematic diagram of the rotary scraping of the outer wall of the filter assembly;

[0053] Fig.10 is a schematic diagram of a rotating mechanism of a rotating bracket;

[0054] Fig.11 It is a schematic diagram of the cooperation between the base and the bottle body;

[0055] Fig.12 It is a schematic diagram of the cooperation between the filter assembly and the scraper;

[0056] Fig.13 is a schematic diagram of the filter assembly and the cutter structure of Example 2;

[0057] Fig.14 is a schematic diagram of the filter assembly and the cutter structure of Example 3;

[0058] Fig.15 It is a schematic diagram of the driving structure of the rotating bracket of Example 3. DETAILED DESCRIPTION

[0059] The present invention will be further described below with reference to specific embodiments.

[0060] Example 1, see Figure 1-Figure 10 As shown, a low load start filter comprises:

[0061] The housing 10 has a water inlet 11 and a water outlet 12 at its upper portion, and a sewage outlet 13 at its lower portion;

[0062] The filter assembly 20 is cylindrical and installed in the middle of the housing 10;

[0063] The scraping mechanism 30 is rotatably mounted in the housing 10 and is used to scrape off debris on the surface of the filter assembly 20;

[0064] The valve 14 is used to close or open the sewage outlet 13; when the valve 14 is opened, water flows through the impeller 31 of the rotary scraper mechanism 30 and pushes the rotary scraper mechanism 30; the valve is usually a ball valve, which can be designed to be opened manually or electrically. The present embodiment is electrically opened at a fixed time for fully automatic cleaning.

[0065] The rotary scraping mechanism 30 includes a rotating bracket 32, on which a plurality of mounting grooves 321 are provided, and scrapers 33 are placed in the mounting grooves; when the rotating bracket 32 ​​rotates, the rotating bracket rotates around the filter assembly, and the centrifugal force directly or indirectly acts on the scrapers 33, so that the scrapers 33 are closely attached to the surface of the filter assembly 20. The scrapers 33 include inner scrapers 33a and outer scrapers 33b. The mounting grooves 321 limit the extension direction of the scrapers 33 to ensure the cleaning effect. The mounting grooves 321 are arranged radially around the filter assembly 20.

[0066] Preferably, the upper end of the filter assembly 20 is connected to the water inlet 11 ; the lower end of the filter assembly 20 is connected to the sewage outlet 13 ; and the chamber outside the filter assembly 20 is connected to the water outlet 12 .

[0067] Preferably, the rotary scraping mechanism 30 comprises a filter inner wall rotary scraping mechanism: a first column 325 is provided in the middle of the rotating bracket 32, a first mounting groove 321a is provided on the side of the first column, an inner scraping blade 33a is provided in the first mounting groove 321a, and the first column 325 extends into the interior of the filter assembly 20;

[0068] When the rotating bracket 32 ​​is rotated by an external force, the first column 325 rotates and throws the inner scraper 33 a out to be closely attached to the inner wall of the filter assembly 20 .

[0069] The first installation groove 321a is a through groove that passes through both sides of the column; two inner scrapers 33a are arranged in the first installation groove 321a and extend from openings on both sides of the first installation groove 321a respectively.

[0070] Preferably, the rotary scraping mechanism 30 comprises a filter outer wall rotary scraping mechanism: a plurality of second columns 327 are arranged on the peripheral side of the rotating bracket 32, a second mounting groove 321b is arranged on the second column 327, and a filter outer scraper 33b is placed in the second mounting groove; a swing rod 34 is hinged on the second column 327 outside the filter outer scraper 33b;

[0071] When the rotating bracket 32 ​​rotates, one end of the swing rod 34 is thrown outward by the centrifugal force to form a centrifugal end 341, and the other end of the swing rod 34 moves inward to form a working end 342. The working end 342 pushes the outer scraper 33b of the filter screen against the filter assembly 20. Fig. 9As shown, the weight ratio of the working end 342 to the centrifugal end 341 can be designed to be 1:4, and a better tightening effect can be achieved with only a slight swing.

[0072] Preferably, the outer scraper blade 33b of the filter screen is a flexible sheet material, and the outer scraper blade 33b of the filter screen can be made of a sheet material of a certain thickness made of silicone; an auxiliary strip 331 is embedded inside the outer scraper blade 33b of the filter screen, and the auxiliary strip 331 is arranged along the length direction of the outer scraper blade 33b of the filter screen, and the auxiliary strip 331 has a certain hardness. The auxiliary strip 331 can be made of a light metal piece, such as a stainless steel sheet; if there is no auxiliary strip, when the working end 342 presses against the outer scraper blade 33b of the filter screen inward, there are only two force points, and the outer scraper blade 33b of the filter screen will be deformed, making the cleaning effect weaker;

[0073] Each outer scraper blade 33b of the filter is equipped with two rocker arms 34, which are arranged one above the other in the second mounting groove. The working ends of the two rocker arms are respectively located on the upper and lower sides of the outer scraper blade 33b of the filter, and the centrifugal ends of the two rocker arms are located in the middle of the outer scraper blade 33b of the filter, thereby ensuring the compacting effect and improving the cleaning ability.

[0074] In this embodiment, two second columns 327 are provided, which are respectively located on two opposite sides; and corresponding filter screen outer wall rotary scraping mechanisms are disposed on the two second columns.

[0075] Preferably, the scraping mechanism 30 includes a shell inner wall scraping mechanism: a third column 326 is arranged on the circumferential side of the rotating bracket 32, a third mounting groove 321c is arranged on the outer side of the third column 326, and a bottle body scraper 33c is arranged in the third mounting groove 321c; when the rotating bracket 32 ​​rotates, the third column throws the bottle body scraper 33c out to fit tightly against the inner wall of the shell 10.

[0076] Preferably, the rotary scraping mechanism includes a driving mechanism: a fixed seat 35 is provided on the inner side of the lower part of the housing 10, and a rotating bracket 32 ​​is rotatably provided inside the fixed seat 35; the impeller 31 is fixed to the lower part of the rotating bracket 32, and a water flow outlet 311 is provided on the circumference of the impeller; the water flow outlet 311 faces the water flow impact surface 351 inside the fixed seat 35, and the water flow impact surface 351 includes a recessed portion 352 and a convex portion 353 arranged at intervals. The lower part of the fixed seat 35 is directly connected to the sewage outlet, and only the sewage outlet needs to be opened to make the water flow smooth from top to bottom, and the water flow passes through the impeller and is sprayed to the water flow impact surface 351. When the impeller rotates, the water flow ejected from the water flow outlet passes through the recessed portion and the convex portion in sequence, which will change the smoothness of the water flow discharge, so that the force on the impeller is a changing state, so that the rotation of the rotating bracket is more explosive and the scraping effect is better.

[0077] Preferably, a plurality of vertical convex strips are provided on the water flow impact surface 351, and a groove is formed between two adjacent convex strips.

[0078] The rotating bracket includes a base 322, the middle part of the base 322 extends downward to form a screw connection column 324, and a through hole 323 is provided on the base around the screw connection column 324;

[0079] The impeller 31 includes a cover plate 313 and a plurality of blades 312. The blades 312 are formed on the cover plate 313, and the water outlet 311 is formed between two adjacent blades 312.

[0080] The cover plate 313 is installed on the screw-connecting column 324 and cooperates with the base 322 to form an impeller cavity. The water flow on the upper part of the rotating bracket 32 ​​passes through the through hole 323 and then passes through the impeller 31.

[0081] The lower part of the rotating bracket 32 ​​is provided with a bearing 36, and the bearing 36 is installed in the bearing installation position 355 of the fixing seat 35;

[0082] A gasket 37 is provided between the impeller 31 and the rotating bracket 32, and the upper side of the gasket 37 cooperates with the base 322 to clamp the inner ring portion of the bearing 36. This design makes the installation of the rotating bracket 32 ​​simpler and the sealing is reliable.

[0083] The water flow impact surface 351 is provided with a plurality of vertical convex strips, and a groove is formed between two adjacent convex strips. The convex strip is the convex part, and the groove is the concave part.

[0084] The distance between the convex strip and the water outlet is 1-5mm; the width of the groove is 2-5mm; the width of the convex strip is 1-3mm; the width of the water outlet is 2-5mm. When the width of the water outlet is greater than the width of the convex strip, the smoothness of the water discharge will change more obviously, the force of the impeller will change more frequently but the amplitude will be correspondingly gentle, and this design can more smoothly ensure the normal operation of the rotary scraper mechanism.

[0085] Preferably, the housing 10 includes a bottle body 15 and a base 16;

[0086] A sleeve 163 is formed downwardly in the middle of the inner side of the base 16, and the sleeve 163 is connected to the water inlet 11 or the water outlet 12;

[0087] The upper end of the filter assembly 20 extends into the sleeve 163 and is sealed against the wall of the sleeve 163;

[0088] A spring 164 is disposed in the sleeve 163 , and the lower end of the spring abuts against the upper end of the filter assembly 20 , so that the filter assembly 20 maintains a downward movement trend, and the lower end of the filter assembly fits against the middle of the rotating bracket 32 ​​.

[0089] The filter assembly 20 includes an upper fixing ring 201, a lower fixing ring 202 and a filter cartridge 203;

[0090] The upper fixing ring 201 and the lower fixing ring 202 are respectively installed at the upper and lower ends of the filter cartridge 203. A positioning protrusion 204 is provided on one side of the upper fixing ring 201, and the positioning protrusion 204 cooperates with the positioning groove in the sleeve 163 to prevent the filter assembly from deflecting.

[0091] The upper fixing ring 201 and the lower fixing ring 202 are made of hard wear-resistant plastic, and engineering plastic can be selected. A wear-resistant ring 206 is provided at the bottom of the filter assembly 20, and the wear-resistant ring 206 contacts the surface of the base 322. The wear-resistant ring 206 is made of hard wear-resistant plastic or ceramic material or stainless steel material, and engineering plastic can be selected. When the wear-resistant ring 206 or the lower fixing ring 202 is worn, the spring 164 enables the entire filter assembly 20 to move downward and automatically compensate.

[0092] The filter cartridge 203 is a cylindrical body, which is formed by curling a square filter sheet along the width direction and bonding the two ends together, and has no skeleton support.

[0093] The outer diameters of the upper fixing ring 201 and the lower fixing ring 202 of the filter assembly 20 are larger than the outer diameter of the filter cartridge 203, so that a concave area 205 is formed on the side of the filter assembly;

[0094] The inner end of the filter outer scraper 33b extends into the concave area 205 and prevents the filter assembly 20 from detaching from the rotating bracket 32. This design can prevent the filter assembly 20 from moving upward when the spring fails. The filter cartridge 203 is a very thin layer of metal mesh; in the non-rotating state, the inner scraper 33a and the filter outer scraper 33b are close to the inner and outer sides of the filter cartridge 203, but not tightly. Just a slight rotation can be used to compress it by centrifugal force.

[0095] Preferably, the base includes a metal outer shell 161 and a plastic inner shell 162, so that the metal part does not contact the water flow, ensuring that the water flow will not be contaminated by heavy metals and is not easy to rust;

[0096] In the north, the base is prone to freezing and cracking, which can lead to indoor water leakage and heavy losses. This design provides double insurance. Even if the metal outer shell is frozen and cracked, the plastic inner shell can remain intact, ensuring safe and reliable water delivery.

[0097] The metal shell 161 is in the shape of a cylinder with a closed top. A water inlet pipe 165 is provided on one side of the metal shell 161, and a water outlet pipe 166 is provided on the other side of the metal shell.

[0098] The plastic inner shell 162 is attached to the inner wall of the metal outer shell 161, and a sleeve 163 is formed downward from the top of the plastic inner shell. The sleeve is concentrically arranged with the plastic inner shell and divides the chamber of the plastic inner shell into a water inlet chamber 167 and a water outlet chamber 168.

[0099] The inner wall of the water inlet pipeline 165 is provided with a plastic water inlet inner tube 169, the inner end of the water inlet inner tube 169 extends to the sleeve 163 and communicates with the water inlet cavity 167;

[0100] The inner wall of the water outlet pipeline 166 is provided with a plastic water outlet inner tube 170 , and the inner end of the water outlet inner tube 170 extends to the water outlet cavity 168 .

[0101] The lower part of the metal shell 161 is provided with a threaded part 171 for the filter bottle to be screwed into.

[0102] The threaded portion 171 is exposed from the plastic inner shell 162.

[0103] A gasket 172 is disposed at the top of the threaded portion 171 , and the inner side of the gasket 172 is in contact with the plastic inner shell 162 ; when the bottle body 15 is screwed into the threaded portion 171 , the top of the bottle body 15 abuts against the gasket 172 .

[0104] In the initial state, the inner scraper blade 33a, the outer scraper blade 33b of the filter screen and the bottle body scraper blade 33c will not cause resistance to the rotating bracket, so that the rotating bracket can rotate quickly. Based on the centrifugal force, the faster the rotating bracket rotates, the better the tightness of the inner scraper blade 33a, the outer scraper blade 33b of the filter screen and the bottle body scraper blade 33c, the better the scraping effect, the load of the rotating bracket gradually increases, and the rotation speed and load are balanced.

[0105] After the inner scraper 33a, the outer scraper 33b of the filter screen and the bottle scraper 33c are worn, they are automatically compensated by centrifugal force, and they are more closely fitted and have a better scraping effect.

[0106] In the present application, the water flows from the inside of the filter assembly 20 to the outside, and the impurities in the water flow are intercepted on the inner wall of the filter and can be discharged through the drain outlet; some small particles of impurities will pass through the filter, and when discharging sewage, the small particles of impurities can also pass through the filter again and be discharged through the drain outlet, or they can be discharged through the water outlet.

[0107] In this embodiment, a cutter structure is also designed to cut the flocculent suspended matter in the water flow, such as Figure 7 and 8As shown, a blade portion 2061 is provided on the inner side of the wear-resistant ring 206, and the blade portion 2061 can be integrally formed with the wear-resistant ring 206, and the blade portion 2061 extends inward to the top of the through hole 323 and fits the surface of the base 322; when the wear-resistant ring 206 and the filter assembly 20 are fixed as one, when the filter assembly 20 and the rotating bracket 32 ​​rotate relatively, the blade portion 2061 performs shearing along the surface of the base 322, and the rotating area of ​​the blade portion 2061 can cover the through hole 323, so that the flocculent floating objects stuck at the through hole 323 are chopped up for easy discharge. The flocculent floating objects in the water flow are easily stuck at the through hole 323.

[0108] like Fig.12 As shown, the filter assembly 20 is fixed, and the inner scraper 33a, the outer scraper 33b and the bottle body scraper 33c all rotate in the circumferential direction and are subjected to the centrifugal force; the inner scraper 33a squeezes the inner wall of the filter assembly 20; the outer scraper 33b squeezes the outer wall of the filter assembly 20 under the action of the swing rod 34; the bottle body scraper 33c squeezes the inner wall of the bottle body;

[0109] There are more than two sets of inner scraper blades 33a, outer scraper blades 33b and bottle scraper blades 33c;

[0110] The working surface of the inner scraper blade 33a is provided with a first groove 331a, and the first grooves 331a between different inner scrapers 33a are staggered, so that each inner scraper blade 33a is responsible for cleaning the inner wall of the filter assembly 20 in a different section, further reducing the resistance of the inner scraper blade 33a to the rotating bracket;

[0111] The working surface of the filter outer scraper 33b is provided with a second groove 331b, and the second grooves 331b between different filter outer scrapers 33b are staggered, so that each filter outer scraper 33b is responsible for cleaning the outer wall of the filter assembly in different sections, further reducing the resistance of the filter outer scraper 33b to the rotating bracket;

[0112] A third groove 331c is arranged on the working surface of the bottle body scraper 33c, and the third grooves 331c between different bottle body scrapers 33c are staggered, so that each bottle body scraper 33c is responsible for cleaning the inner wall of the bottle body in different sections, further reducing the resistance of the bottle body scraper 33c to the rotating bracket.

[0113] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that Fig.13As shown, during filtering, water flows inward from the outside of the filter assembly 20 (correspondingly, the outside of the filter assembly 20 is connected to the water inlet, and the pipeline inside the filter assembly 20 is connected to the water outlet), and impurities are blocked on the outside of the filter cartridge 203; the inside of the filter cartridge 203 is supported by a skeleton 207, and the skeleton 207 is formed by curling a stainless steel plate, and hollow water holes are arranged on the surface of the stainless steel plate; the bottom of the filter assembly 20 is a closed structure, and a water gap is formed between the bottom of the filter assembly 20 and the base 322. When the lower sewage outlet is opened, water flows directly through the bottom of the filter assembly, and then enters the through hole 323 and is discharged downward.

[0114] The skeleton 207 can prevent the filter cartridge 203 from sinking inwards; in addition, since the skeleton is loaded, the first column 325 in the middle and the corresponding inner scraper 33a structure are eliminated.

[0115] The cutter structure of this embodiment is different from that of the first embodiment, which is specifically manifested as follows: a fixed shaft 90a is further provided at the bottom of the filter assembly 20, and a blade 91a is provided on the fixed shaft 90a; the lower end of the fixed shaft 90a abuts against the rotating bracket 32; the filter assembly 20 and the blade 91a are relatively fixedly arranged;

[0116] When the rotating bracket 32 ​​rotates, it rotates relative to the blade; there may be suspended flocs in the water flow, and the rotation of the rotating bracket 32 ​​causes the through hole 323 to rotate, so that the water flow rotates and drives the suspended flocs, so that the suspended flocs are cut by the blade for easy discharge.

[0117] Embodiment 3: This embodiment is basically the same as Embodiment 2. A skeleton 207 is provided inside the filter assembly 20. The bottom of the filter assembly 20 is closed. The difference is as follows: Fig.13 and Fig.14 As shown, this embodiment proposes another new cutter structure, the filter assembly 20 is rotatably installed in the bottle body 15, a rotating shaft 90b is fixedly arranged at the bottom of the filter assembly 20, and a blade 91b is arranged on the rotating shaft 90b; an open hole 3211 is arranged in the middle of the rotating bracket 32, and the lower end of the rotating shaft 90b passes through the open hole 3211 and is fixedly connected to the impeller 31; the impeller 31 drives the rotating shaft 90b, and then drives the filter assembly 20 to rotate at a high speed; the rotary scraping mechanism 30 cleans the impurities on the surface of the filter assembly 20, and the high-speed rotation of the filter assembly 20 can further throw away the stubborn impurities on the surface; the effect of the blade 91b is to cut up the suspended floccules;

[0118] The rotating bracket 32 ​​is installed on the bearing 36, and three planetary wheels 80 are arranged at the bottom of the rotating bracket 32. The three planetary wheels 80 surround the rotating shaft 90b and mesh with the middle part of the rotating shaft 90b; a gear ring 37 is mounted on the outer side of the planetary wheel 80; when the rotating shaft 90b rotates, the rotating bracket 32 ​​is also driven to rotate; since there is a difference in the number of teeth between the planetary wheels 80 and the rotating shaft 90b, there is also a speed difference between the rotating bracket 32 ​​and the filter assembly 20, thereby achieving a scraping effect.

[0119] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter for low load startup, comprising: A shell (10) having a water inlet (11) and a water outlet (12) at its upper portion and a sewage outlet (13) at its lower portion; The filter assembly (20) is cylindrical and installed in the middle of the housing (10); A rotary scraping mechanism (30) is rotatably mounted in the housing (10) and is used to scrape off debris on the surface of the filter assembly (20); A valve (14) is used to close or open the sewage outlet (13); when the valve (14) is opened, water flows through the impeller (31) of the rotary scraping mechanism (30) and pushes the rotary scraping mechanism (30); It is characterized in that The rotary scraping mechanism (30) comprises a rotary bracket (32), a plurality of mounting grooves (321) are provided on the rotary bracket (32), and scraping blades (33) are placed in the mounting grooves; The scraper (33) comprises a filter screen outer scraper (33b); when the rotating bracket (32) rotates, centrifugal force indirectly acts on the filter screen outer scraper (33b), so that the filter screen outer scraper (33b) is closely attached to the outer surface of the filter screen assembly (20); The specific structure of the centrifugal force indirectly acting on the filter screen outer scraper (33b) is as follows: the rotary scraping mechanism (30) further comprises a filter screen outer wall rotary scraping mechanism: a plurality of second columns (327) are arranged on the peripheral side of the rotating bracket (32), a second mounting groove (321b) is arranged on the second column (327), and the filter screen outer scraper (33b) is placed in the second mounting groove; A swing rod (34) is hingedly connected to the second upright column (327) on the outside of the filter screen outer scraper (33b); When the rotating bracket (32) rotates, one end of the swing rod (34) is thrown outward by centrifugal force to form a centrifugal end (341), and the other end of the swing rod (34) moves inward to form a working end (342), and the working end (342) presses the outer scraper (33b) of the filter screen against the filter screen assembly (20).

2. A low-load start-up filter according to claim 1, characterized in that: The upper end of the filter assembly (20) is in communication with the water inlet (11); the lower end of the filter assembly (20) is in communication with the sewage outlet (13); and the chamber outside the filter assembly (20) is in communication with the water outlet (12).

3. A low-load start-up filter according to claim 1, characterized in that: The rotary scraping mechanism (30) comprises a filter screen inner wall rotary scraping mechanism: a first column (325) is arranged in the middle of the rotating bracket (32), a first mounting groove (321a) is arranged on the side of the first column, and an inner scraping blade (33a) is arranged in the first mounting groove (321a); ​​the first column (325) extends into the interior of the filter screen assembly (20); When the rotating bracket (32) is rotated by an external force, the first column rotates and throws the inner scraper (33a) out until it is closely attached to the inner wall of the filter assembly (20).

4. A low-load start-up filter according to claim 1, characterized in that: The outer scraper blade (33b) of the filter screen is a flexible sheet material, and an auxiliary strip (331) is embedded inside the outer scraper blade (33b), and the auxiliary strip (331) has a certain hardness.

5. A low-load start-up filter according to claim 1, characterized in that: The rotary scraping mechanism (30) comprises a shell inner wall rotary scraping mechanism: a third column (326) is arranged on the circumference of a rotating bracket (32), a third mounting groove (321c) is arranged on the outer side of the third column (326), and a bottle body scraping blade (33c) is arranged in the third mounting groove (321c); when the rotating bracket (32) rotates, the third column throws the bottle body scraping blade (33c) out until it is closely attached to the inner wall of the shell (10).

6. A low-load start-up filter according to claim 1, characterized in that: The rotary scraping mechanism comprises a driving mechanism: a fixed seat (35) is arranged on the inner side of the lower part of the housing (10), and a rotating bracket (32) is rotatably arranged inside the fixed seat (35); the impeller (31) is fixed to the lower part of the rotating bracket (32), and a water flow outlet (311) is arranged on the circumference of the impeller; the water flow outlet (311) faces a water flow impact surface (351) on the inner side of the fixed seat (35), and the water flow impact surface (351) comprises a recessed portion (352) and a convex portion (353) arranged at intervals.

7. A low-load start-up filter according to claim 6, characterized in that: The water flow impact surface (351) is provided with a plurality of vertical convex strips, and a groove is formed between two adjacent convex strips.

8. The low-load start-up filter according to claim 1, characterized in that: The housing (10) comprises a bottle body (15) and an end cover (16); A sleeve (163) is formed downwardly in the middle of the inner side of the end cover (16), and the sleeve (163) is connected to the water inlet (11) or the water outlet (12); The upper end of the filter assembly (20) extends into the sleeve (163) and is in close contact with the wall surface of the sleeve (163) to form a seal; A spring (164) is disposed in the sleeve (163), the lower end of the spring abutting against the upper end of the filter assembly (20), so that the filter assembly (20) maintains a downward movement trend, and the lower end of the filter assembly abuts against the middle of the rotating bracket (32).

9. A low-load start-up filter according to claim 8, characterized in that: The end cover comprises a metal outer shell (161) and a plastic inner shell (162); The metal shell (161) is in the shape of a cylinder with a closed top, a water inlet pipeline (165) is provided on one side of the metal shell (161), and a water outlet pipeline (166) is provided on the other side of the metal shell; The plastic inner shell (162) is attached to the inner wall surface of the metal outer shell (161), and a sleeve (163) is formed downwardly on the top of the plastic inner shell. The sleeve is arranged concentrically with the plastic inner shell and divides the chamber of the plastic inner shell into a water inlet chamber (167) and a water outlet chamber (168); The inner wall of the water inlet pipeline (165) is provided with a plastic water inlet inner tube (169), and the inner end of the water inlet inner tube (169) extends to the sleeve (163) and communicates with the water inlet cavity (167); The inner wall of the water outlet pipeline (166) is provided with a plastic water outlet inner tube (170), and the inner end of the water outlet inner tube (170) extends to the water outlet cavity (168).

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